And when I join the fray like this, it is with the aim of making a
model that may apply in *some* useful set of situations, such as sites
that voluntarily cooperate with such a model ("this site respects
REST" / "this site respects webarch" etc), but does not necessarily
apply in *all* situations where HTTP is used. The web and HTTP are too
diverse and wild to be able to say much about them in general, except
that packets get sent around.